Lined Valves
Lined Valves
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PTFE Lined Plug Valve
Lined quarter-turn plug valve, NB 1" to 10"
Lined quarter-turn plug valve with a wiping seating action that suits slurries and crystallising media — NB 1" to 10", lined in PFA or FEP.
| Product type | Lined plug valve, quarter-turn |
|---|---|
| Body / steel grade | ASTM A 216 Gr. WCB |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 3307 (PFA), ASTM D 4894-19 |
| Lining options | Virgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116 |
| Flange standard | ASME/ANSI B16.5 |
| Flange class | Class 150 standard; Class 300 on request |
| Size range | NB 1" to NB 10" |
Product overview
What it does, and where it fits.
A plug valve rotates a tapered plug across the bore. That quarter-turn action wipes the seat as it moves, which clears the deposits that would gradually prevent a ball valve from seating on slurry, crystallising or precipitating service.
The lined version presents fluoropolymer on the plug, the seat and the body cavity. Body is a casting to ASTM A 216 Gr. WCB, flanged to ASME/ANSI B16.5 Class 150, with face-to-face matching the lined ball and non-return valves at every bore.
Features
Built into every unit.
- Wiping quarter-turn seating action clears deposits from the seat
- Cast body to ASTM A 216 Gr. WCB, lined and flanged to B16.5 Class 150
- NB 1" to 10", face to face 127 mm to 300 mm
- Face-to-face interchangeable with the lined ball and non-return valves
- Stainless steel body on request
Benefits
Why it earns its place in the line.
- Seats reliably on slurry and crystallising duties that foul a ball valve
- Simple quarter-turn operation with positive shut-off
- Outstanding corrosion resistance to aggressive organic and inorganic chemicals across a wide temperature range
- Non-stick, non-wetting bore — low surface energy keeps product moving and simplifies cleaning
- Chemically inert and pure; no additives, plasticisers, stabilisers or lubricants to contaminate the process fluid
- The lowest coefficient of friction of any solid, reducing pressure drop and deposit build-up
Applications & industries
Where it is specified.
Typical applications
- Slurry, crystallising and precipitating service
- Lines carrying suspended solids or scale
- Isolation where a ball valve fouls in service
- High-purity duties where metal pick-up is unacceptable
Industries served
- Chemical processing
- Pharmaceutical
- Petrochemical
- Oil & gas
- Power generation
- Pulp & paper
- Mining & metallurgy
- Agrochemicals & dyes
Technical data
Specification for PTFE Lined Plug Valve.
Figures below are for this product only — every item in the range carries its own dimension table.
| Product type | Lined plug valve, quarter-turn |
|---|---|
| Body / steel grade | ASTM A 216 Gr. WCB |
| Lining material | PTFE / PFA / FEP |
| Liner standard | ASTM D 3307 (PFA), ASTM D 4894-19 |
| Lining options | Virgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116 |
| Flange standard | ASME/ANSI B16.5 |
| Flange class | Class 150 standard; Class 300 on request |
| Size range | NB 1" to NB 10" |
| Temperature range | Continuous service to 260 °C (PTFE melting point 327 °C, PFA 306 °C, FEP 260 °C) |
| Pressure rating | ASME/ANSI B16.5 Class 150 flanges as standard; Class 300 available on request |
| Manufacturing standard | ASTM F 1545 |
| Spark testing | Every lined component spark tested at 5000 × E volts (E = liner thickness in mm), to a maximum of 15 000 V |
| Hydro testing | Hydrostatic or pneumatic test according to the lining technique; hydrostatic test on components with vent holes |
| Inspection | Dimensional and visual examination of liner and steel parts — weld aspect, overall dimensions, collar size, liner thickness, surface flaws and paint thickness |
| External protection | Zinc epoxy primer, minimum 60 μm dry film, over steel sand-blasted to SA 2.5 |
| Certification | EN 10204 3.1 mill certificates and FDA certification for the fluoropolymer available on request |
| Face to face | 127 mm to 300 mm, tolerance ±3 mm |
| Size | Face to face L (±3) | PTFE | PFA | FEP |
|---|---|---|---|---|
| 1" | 127 | — | ✓ | ✓ |
| 1.5" | 165 | — | ✓ | ✓ |
| 2" | 178 | — | ✓ | ✓ |
| 2.5" | 190 | — | ✓ | ✓ |
| 3" | 203 | — | ✓ | ✓ |
| 4" | 229 | — | ✓ | ✓ |
| 6" | 267 | — | ✓ | ✓ |
| 8" | 292 | — | ✓ | ✓ |
| 10" | 300 | — | ✓ | ✓ |
All dimensions in mm. Face-to-face matches the lined ball and non-return valves of the same bore.
Available on request
- Stainless steel body
FAQ
Questions we are asked about this item.
Choose a plug valve where the medium carries solids, crystallises or precipitates — the wiping action keeps the seat clean. A ball valve is the better general-purpose isolator on clean service.
Yes, it is a quarter-turn valve. Note that plug valves generally need higher operating torque than ball valves, so size the actuator accordingly.
Related products
Commonly specified alongside PTFE Lined Plug Valve.
Enquiry
Tell us your line size — we'll confirm the spec.
Send the bore, the media, the temperature and pressure, and the flange standard you work to. Drawings and custom sizes welcome.
Not sure which spec fits your process?
Send your requirement — media, temperature, pressure, dimensions — and we'll recommend the right product or fabricate it.
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